Dual D-Type Positive Edge-Triggered Flip-Flop
(Previous ADE-205-361 (Z))
The HD74AC74 is a dual D-type flip-flop with Asynchronous Clear and Set inputs and complementary (Q, Q) outputs.
Information at the input is transferred to the outputs on the positive edge of the clock pulse. Clock triggering occurs at a
voltage level of the clock pulse and is not directly related to the transition time of the positive-going pulse. After the
Clock Pulse input threshold voltage has been passed, the Data input is locked out and information present will not be
transferred to the outputs until the next rising edge of the Clock Pulse input.
Low input to SD (Set) sets Q to High level
Low input to CD (Clear) sets Q to Low level
Clear and Set are independent of clock
Simultaneous Low on CD and SD makes both Q and Q High
• Outputs Source/Sink 24 mA
• Ordering Information
Package Type Package Code Package Abbreviation Taping Abbreviation (Quantity)
DP-14, -14AV P
HD74AC74FPEL SOP-14 pin (JEITA) FP-14DAV
EL (2,000 pcs/reel)
HD74AC74RPEL SOP-14 pin (JEDEC) FP-14DNV
EL (2,500 pcs/reel)
HD74AC74TELL TSSOP-14 pin
ELL (2,000 pcs/reel)
Notes: 1. Please consult the sales office for the above package availability.
2. The packages with lead-free pins are distinguished from the conventional products by adding V at the end of
the package code.
Rev.2.00, Jul.16.2004, page 1 of 7